Osimertinib Recruiting Phase 1 / 2 Trials for EGFR NP_005219.2:p.L858R / Lung Non-Small Cell Carcinoma / Stage IVA Lung Cancer AJCC v8 / Stage IVB Lung Cancer AJCC v8 / Stage IV Lung Cancer AJCC v8 / EGFR T790M Mutation Negative / EGFR Activating Mutation / EGFR Exon 19 Deletion Mutation / Metastatic Lung Carcinoma / Advanced Lung Carcinoma Treatment